Hard Cough

My dog who is 6 is showing signs of kennel cough but only started showing symptoms a couple of days ago. He was in boarding for about a week and has had the vaccine. Do symptoms take this long to show up? He has had it before and I noticed the symptoms within a couple of days. He has a cough that makes him almost chock and vomit. Or does this sound like a cold?

Thats kennel cough, (as a dog trainer/shower I know it well!) and the symptoms CAN take that long and just be building up.